=>
1. Phong asked Peter if/whether he enjoyed reading.
Lùi thì HTĐ sang QKĐ
2. Hoa asked Lan if she liked sport.
Lùi thì HTĐ sang QKĐ
3. She asked Nam if his sister and brother went to the same school.
Lùi thì HTĐ sang QKĐ
4. She asked her mom if there were some oranges in the fridge.
Lùi thì HTĐ sang QKĐ
5. He asked his friend if it would rain the following morning.
Lùi thì will -> would/ tomorrow morning -> the following morning
6. Tam asked Peter if he had gone to Hue three years before.
Lùi thì QKĐ -> QKHT/ ago -> before
7. Tuan asked Lan whether Tam and Hoa were late for class.
Lùi thì HTĐ -> QKĐ
8. She asked me if I could speak Chinese.
Can -> could
9. Tam asked Thu if she would be there for five days.
Will -> would/ here -> there
10. She asked Ba if he had been reading that book at 8'clock.
Lùi thì QKTD -> QKHTTD